(7S,12bR)-7-amino-2,3,4,7,8,12b-hexahydro-1H-pyrido[2,1-a][2]benzazepin-6-one 、
(6E)-6,7,8,9-tetradeoxy-8,8-dimethyl-2-O-methyl-3,5-O-(1-methylethylidene)-gulo-non-6-enonic acid lactone 在
sodium 2-ethylhexanoic acid 作用下,
以
四氢呋喃 为溶剂,
反应 96.0h,
以85%的产率得到(R)-2-[(4R,5S,6R)-6-((E)-3,3-dimethylbut-1-enyl)-5-hydroxy-2,2-dimethyl-1,3-dioxan-4-yl]-2-methoxy-N-((7S,12bR)-6-oxo-1,2,3,4,6,7,8,12b-octa-hydropyrido[2,1-a][2]benzazepin-7-yl)acetamide